"Something" is a classic ballad by The Beatles, written by George Harrison. The original features expressive guitar work and a gentle, flowing feel. Capturing its mood is key to playing it well.
The song is in a slow to moderate tempo, with a laid-back, expressive rhythm. Start by practicing the chord changes slowly, as there are several chords that may be new for beginners, such as Cmaj7, D7, Amaj7, F#m, and D#.
Try a gentle down-down-up-up-down-up strumming pattern for the verses, or simply play soft downstrokes to match the mellow mood. For the intro and interludes, you can use single downstrokes for each chord.
Pay special attention to transitions like C to Cmaj7 to C7—they only require small finger movements. Notice that Am to Am7 is also an easy change, only lifting your 3rd finger. Practice moving between F and D#, as the barre shape can be tricky. For the bridge, practice switching between Amaj7, F#m, and D; use barre chord shapes for F#m and D#.
Let the chords ring and avoid rushing. If barre chords are difficult, use simplified versions (such as F as XX3211). Listen to the original to follow the dynamics and phrasing. Take your time; clarity and emotion are more important than speed.